Hydrogen Peroxide → Oxotungsten

HRID 1649967Notes

Reaction equation

HRID 1649967 reaction equation
[OH-].[NH4+:2].OO.[NH4+].[NH4+].[O-:7][W:8]([O-:11])(=[O:10])=[O:9]>O>[NH4+:2].[NH4+:2].[O-:10][W:8]([O-:11])(=[O:9])=[O:7].[W:8]=[O:7]

Participants

6

Reactant 3

HCID 784Hydrogen PeroxideHCID 14923Ammonium HydroxideHCID 3084095Ammonium tungstate(VI)

Product 2

HCID 139486OxotungstenHCID 3084095Ammonium tungstate(VI)

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
80 °C

Procedure

(NH4)2WO4 (15.0 g: 52.8 mmoles) is added to about 400 ml of water to which 25 ml of ammonium hydroxide and 5 ml of 30 percent hydrogen peroxide are added. The ammonium tungstate is dissolved slowly by heating the mixture to about 80° C. with stirring. After a clear homogenous solution forms, the solution is cooled to room temperature. The solution is added to a flask containing 25.0 g of alumina (Catapal SB 20-35 mesh: 280 m2 /g). The resulting mixture is rotary evaporated to remove water, and then calcined in a muffle furnace at 300° C. overnight to yield a supported ammonium tungstate or tungsten oxide.

Workup

  1. additionare added
  2. temperatureAfter a clear homogenous solution forms, the solution is cooled to room temperature
  3. additionThe solution is added to a flask
  4. additioncontaining 25.0 g of alumina (Catapal SB 20-35 mesh: 280 m2 /g)
  5. customThe resulting mixture is rotary evaporated
  6. customto remove water

Sources & evidence

ORD record
ord-50ff8a2ac106457f8aa2c4192348f852
Source dataset
uspto-grants-1990_05
Patent number
US04922024

Reaction notes

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